Do All Animals Have Hearts?

Answer

All animals have hearts; the only difference is that their hearts are different in structures. For instance, the mammalian heart is four chambered, the reptile and amphibian heart is three chambered, and that of fish is two chambered.
Q&A Related to "Do All Animals Have Hearts?"
The same reason we do, since we are animals too. We have a heart to pump oxygen and nutrients aronud the body and even waste products to be taken to the correct places.
http://wiki.answers.com/Q/Why_do_animals_have_a_he...
Unicellular animals and jellyfish do not have hearts.
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Bedbugs can cause itching and irritation. Bedbugs are flat, round, brown-colored insects that become more reddish-colored as they consume blood. WebMD explains that, "The bugs
http://www.ehow.com/info_10000733_stuffed-animals-...
This article. http://oreilly.com/news/l. ejeune_ talks about the history of why O'Reilly has animals on the covers of (most of) their books, and no, the author doesn't get any say
http://www.quora.com/Why-do-all-the-OReilly-books-...
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